Microsoft is planning to expose the guts of the compiler, through the Roslyn project currently available as a CTP. The new compiler is written in managed code and provides APIs which allow you to get access to the various parts of the compiler pipeline (such as the parser), allowing access to syntax trees to build your own refactorings, code generation enabling meta programming. Roslyn will lower the barrier of entry for developing such tools, hopefully enabling a host of customer-specific tooling that previously was too costly to consider. This talk will explore what Roslyn has to offer and showcase some uses of this new service.